When a PDF contains selectable text, recipients can directly copy, extract, or even edit the content. For files such as courseware, materials, quotations, and internal documents where text copying is not desired, you can convert each page of the PDF into an image format and re-output it as a PDF. This article, using the interface of HeSoft Doc Batch Tool , demonstrates how to import multiple PDF files at once and batch-process them into page images, allowing the PDF to remain readable and printable while ensuring the text no longer exists in a copyable form, thereby reducing repetitive manual conversion and improving file processing efficiency.
In daily office work, many PDF files are not just for reading; they also carry training materials, study handouts, quotation descriptions, contract attachments, internal process documents, and more. If the text in these PDFs can be selected by the mouse, the recipient can directly copy the text, and even use it secondarily through exporting, editing, or other methods. For scenarios where you only want the other party to view the content but do not want the text to be directly copied, converting PDF page content into image form is a common practice.
Traditional methods usually require opening PDFs one by one, exporting images, and then re-synthesizing them into a PDF. If there are dozens or even hundreds of files, the operation is very repetitive and prone to missed processing. HeSoft Doc Batch Tool is a batch file processing software designed for office scenarios, suitable for handling various file tasks such as PDF, Word, Excel, PowerPoint, and images. The problem this article aims to solve is: how to batch convert every page in multiple PDFs into image form and output them as a new PDF file, so that the pages are readable and printable, but the text can no longer be directly copied.
Applicable Scenarios: Which PDFs are suitable for page image processing
"Converting PDF pages to image form" is suitable for document processing scenarios where you wish to preserve the layout and reduce the risk of text copying. For example, training institutions need to distribute English vocabulary lists, question bank analyses, and handout materials but do not want students to directly copy entire sections of content; enterprises need to send product quotations, promotional materials, or internal explanatory documents and want the recipient to simply view the page effect; positions in administration, human resources, and finance that need to batch process institutional documents, notification attachments, and supporting materials can also use this method to reduce copyability.
It should be noted that converting PDF pages to images is not equivalent to encryption, nor can it replace formal permission controls or digital copyright protection. Its core function is to convert text objects, table objects, etc., in a PDF page into page images, so they are no longer presented as selectable text in ordinary readers. For most office distribution scenarios, this processing can effectively reduce the situation of "copying upon selection."
Effect Preview: Before processing, PDF text can be selected and copied
From the screenshot of the files before processing, it can be seen that there are multiple PDF documents in the folder, such as 1.pdf, 2.pdf, 3.pdf, 4.pdf, 5.pdf. If such tasks are processed one by one, it is not only time-consuming but also requires repeating the same actions for each file, making it very suitable for completion by a batch processing tool.
After opening one of the PDFs, you can see that the English words and definitions on the page can be selected by the mouse. The blue highlighted part in the screenshot indicates that the text is still a text object within the PDF, and options like "Copy" appear in the right-click menu. This means the reader can directly copy the page content.
If these PDFs are just ordinary reading materials, allowing copying is certainly fine; but if the documents are internal materials, test handouts, or content not intended for bulk extraction, further processing is needed.
Effect Preview: After processing, PDF page becomes an image, text cannot be copied as text
After completing the conversion using HeSoft Doc Batch Tool , opening the output PDF again shows that the page appearance still maintains the original layout, tables, and text content, with the reading experience largely unaffected. However, when right-clicking on the page, the menu now shows image-related options, such as "Copy Image," "Save Image As," etc., instead of directly copying text. This change indicates that the PDF page content has been converted into image form.
This result is suitable for office needs that aim to "retain visual content while reducing text copying." The recipient can still view the entire page content but cannot directly select and copy text as they would with a normal text-based PDF.
Operation Step 1: Enter PDF tools, select page to image conversion
After opening HeSoft Doc Batch Tool , select "PDF Tools" from the function categories on the left. The interface will display multiple PDF-related processing functions, such as Add Page Numbers, Extract Pages, Crop Pages, Remove Links, Compress Optimization, Convert to Word, etc. According to the screenshot, the function needed this time is "Convert PDF pages to image form." This function's description is to batch convert each page of a PDF into image form and still output a PDF file, with the purpose of preventing text and content from being directly copied.
After finding "22. Convert PDF pages to image form" in the function list, click the function card to enter the processing interface. It is important here to distinguish between two similar functions: one is to convert PDF pages to image form and output a PDF, and another might be to convert PDF to JPG images. This article uses the former, which is more suitable for scenarios where you want the final file to remain a PDF, making it convenient for continued circulation, printing, and archiving.
Operation Step 2: Add PDF files for batch processing
After entering the "Convert PDF pages to image form" interface, the software enters a wizard-style process. Three phases can be seen at the top: Select records to process, Set save location, Start processing. Currently at step 1, which means first adding the PDF files to be converted into the task list.
The top right area of the interface provides two entry points: "Add Files" and "Import Files from Folder." If you only need to process a few specific files, you can click "Add Files" and select the PDFs one by one; if multiple PDFs are all in the same folder, like 1.pdf to 5.pdf in the screenshot, you can use "Import Files from Folder" to import all PDFs from that entire folder at once, improving batch processing efficiency.
After importing the files, the list will display information such as serial number, name, path, extension, creation time, and modification time. In the screenshot, 5 PDF files have been successfully imported, all with the pdf extension and located in the D drive's test directory. At this point, you can check if the number of files is correct and also delete records that do not need processing via the operation column on the right. "Filter" and "Sort" buttons are also displayed at the top right of the list, which are useful for organizing tasks when there are many files.
Operation Step 3: Confirm the task list and proceed to the next step
After importing files, it is recommended to verify three points. First, confirm that the number of records matches the number of files to be processed; second, confirm that the extension is pdf to avoid accidentally importing irrelevant files; third, check that the paths are from the correct folder, especially important when there are multiple files with the same name on the desktop, downloads, or project directories.
Once confirmed, click the "Next" button at the bottom of the interface. The purpose of this step is not to start the conversion immediately but to enter the save location setting phase. When batch processing PDFs, the save location is very important. It is recommended not to overwrite the original files directly but to choose a new output directory, such as "Imaged PDFs," "Copy-Proof PDFs," or a folder corresponding to the project name. This facilitates comparing the effects before and after processing and allows you to keep the original PDFs for subsequent modifications.
Operation Step 4: Set the save location and start processing
According to the wizard at the top of the interface, the second step is "Set save location," and the third is "Start processing." During the save location stage, the user needs to specify the output directory for the converted PDFs. Setting the output directory properly can avoid file confusion, especially when processing dozens of PDFs at once; using a dedicated folder for the results is recommended.
After completing the settings, enter the "Start processing" stage. The software will process all PDFs in the task list sequentially, converting the content of each PDF page into image form and then outputting it as a PDF file. Compared to manually opening and processing PDFs one by one, the advantages of batch processing are very clear: you only need to import once and set up once, after which the conversion is automatically completed by the software. It is suitable for office tasks with high repeatability and a large number of files.
Frequently Asked Questions and Notes
1. Can the document still be read normally after conversion? Yes. The pages will be presented as images within the PDF, visually retaining the original content, tables, and layout. The processed screenshots also show that the English vocabulary list remains clearly readable.
2. Why does the right-click menu change to "Copy Image" after conversion? This is a normal phenomenon after the page has been imaged. The original text objects have become image content, so the reader recognizes them as images, not ordinary text.
3. Can this method completely prevent the content from being acquired? It cannot absolutely prevent it. Any visible content can be screenshotted, photographed, or recognized through OCR. The main value of page imaging is to reduce the convenience of directly copying text, making it suitable for ordinary office distribution scenarios.
4. Is it recommended to keep the original PDF? Yes, it is recommended. After the pages are imaged, if you need to modify the text content later, you should typically return to the original PDF or source document for modification and then reconvert.
5. How to improve efficiency when there are many files? Put all the PDFs to be processed into a single folder, then use "Import Files from Folder." This is more efficient than adding them one by one and also less prone to omissions.
Summary: Use batch processing to reduce repetitive operations, making PDF distribution easier
Batch converting PDF pages to image form is suitable for solving the office pain point of "PDF text being easily copied directly." Through HeSoft Doc Batch Tool , users can choose "Convert PDF pages to image form" in the PDF tools, import multiple PDFs at once, confirm the list, set the save location, and start processing. After completion, the PDF can still be viewed and printed normally, but the text no longer exists as selectable text.
If you frequently need to process handouts, materials, table descriptions, internal documents, or PDF attachments sent externally, it is recommended to delegate these repetitive operations to batch processing tools. First, prepare the folder of files to be processed, then follow the steps in this article to quickly obtain a version of the imaged PDF suitable for distribution.